_ would lose the efficiencies gained by avoiding the shift key so only - can be used
He wants to show the word that he's faster, but in reality he's not interested in being more efficient.
I do use the Backspace key a lot though. :-)
Well, on most keyboards there aren't actual keys, but instead shift-F1 through shift-F12 produce F13-F24.
did you know that c-a c-e c-n c-p c-d work everywhere in macOS like they do in emacs?